[Noisebridge-discuss] Moar Laser Cutter Infos

Fri Nov 13 17:37:32 UTC 2015

Awesome.  If someone could translate a message to their contact info here:
http://www.jnmydy.com/comcontent_detail/&i=7&comContentId=7.html

that would be awesome.  A translation of something like:

"Hi,
   I am an owner of your MLE-40 Full Spectrum Laser and I need some replacement parts.  Could I order from you a new power Parallel to USB controller PCB and / or a new main power motherboard PCB?  What would be the cost?  I am located in [your location], china."

As they are the original manufacturer an order from them should be substantially cheaper than the US reseller.

-Zach
--------------------------------------------
On Fri, 11/13/15, Scotty Allen <scotty at scottyallen.com> wrote:

 Subject: Re: [Noisebridge-discuss] Moar Laser Cutter Infos
 To: "Mitch Altman" <maltman23 at hotmail.com>
 Cc: "NoiseBridge Discuss" <noisebridge-discuss at lists.noisebridge.net>
 Date: Friday, November 13, 2015, 4:02 AM

 I'm also happy to
 help on the China end of things, if it's useful.
 I'm currently in Shenzhen, and will be here
 at least 2 more weeks.
 Holler if there's
 a way I can be useful.

 -Scotty

 On
 Fri, Nov 13, 2015 at 5:15 AM, Mitch Altman <maltman23 at hotmail.com>
 wrote:
 > Hi Zach,
 >
 >
 > I hope you can fix
 it!
 >
 >
 > The jnmydy website says they are in Jinan,
 which I won't be able to get to while in China.  But,
 if you can contact someone there, you can have them mail the
 boards to me in Beijing.  I can bring them home with me or,
 since I won't be home till the end of January, I ship
 them from China, where shipping is really cheap.  I can
 also pay them directly in Chinese RMB from China (everyone
 there uses an app called WeChat, which I also have, which
 can do pretty much *every*thing, including send
 payments).
 >
 >
 > If the language barrier is a problem, I
 know Chinese people who can help.
 >
 >
 > Best,
 >
 > Mitch.
 >
 >
 >
 >
 ________________________________
 >>
 From: organicunity at hotmail.com
 >> To: noisebridge-discuss at lists.noisebridge.net
 >> Date: Thu, 12 Nov 2015 20:47:04
 +0000
 >> Subject: Re:
 [Noisebridge-discuss] Moar Laser Cutter Infos
 >>
 >>
 >> Wow, that's some super useful info
 Danukeru! Good thing we discussed
 >>
 this on this list so you came across the thread.
 >>
 >> Mitch, if you
 are going to China why not just ask about the parts we
 >> need from the company based there?
 Their website is actually printed
 >>
 on the PCBs inside the Laser Cutter: http://www.jnmydy.com/
 >>
 >> http://s18.photobucket.com/user/Segasonicfan/media/NB%20Hardware%20Class/20151015_225704_zps2heogqs2.jpg.html?sort=3&o=1
 >>
 >> If you get
 the PCBs direct from them I bet it will be much, much
 >> cheaper. I sent them an email in
 English (on their English website
 >>
 version) but received no reply yet. Perhaps someone can
 translate?
 >>
 >>
 and again, let me try and fix the main power PCB before we
 make any
 >> decisions on buying a new
 one (unless someone has money to burn!). It
 >> would be a super huge waste and would
 be like replacing an entire car
 >>
 when you just need a new battery and wheels.
 >>
 >> -Zach
 >>
 >>
 >> ________________________________
 >> From: noisebridge-discuss-bounces at lists.noisebridge.net
 >> <noisebridge-discuss-bounces at lists.noisebridge.net>
 on behalf of
 >> Danukeru
 <danukasan+nb at gmail.com>
 >> Sent: Thursday, November 12, 2015
 12:53 AM
 >> To: Zachary Morriss
 >> Cc: noisebridge-discuss
 >> Subject: Re: [Noisebridge-discuss]
 Moar Laser Cutter Infos
 >>
 >> Reading the manual for the laser
 cutter reveals that we could already
 >> drive the laser cutter now with a copy
 of EMC2.
 >>
 >>
 We have a custom toolchain built around EMC2 for our hobby
 CNC at
 >> foulab, so I can tell you
 pretty certainly that your standard LPT-USB
 >> board/cable will not work due to
 buffering of the pin state that their
 >> controller board most certainly
 does.
 >>
 >> EMC2
 is a GCODE interpreter that drives an analog controller over
 LPT
 >> directly.
 >>
 >> EMC2 takes
 advantage of the LPT port to make sure that the timing is
 as
 >> accurate as possible because
 there is very little feedback from the
 >> steppers themselves. You generally
 need a real-time linux kernel for
 >>
 the best results for this reason. Our CNC runs on an old
 ubuntu with
 >> such a kernel.
 >>
 >> Due to USB
 being much faster, packetizatioin, driving voltage
 levels,
 >> no guarantee on command
 order, etc, there is no assurances on timing on
 >> the LPT pins with a cheap adapter.
 You'll most likely have cumulative
 >> errors/jumps/ etc on actual long runs
 .
 >>
 >> The LPT
 board in the cutter itself is very dumb and relies entirely
 on
 >> what is driving it. It's
 literally a bunch of shift registers bitbanged
 >> over the LPT by either EMC2 or the USB
 controller in this case.
 >>
 >> As such this is where the buffering
 comes in on that small board.
 >>
 Proper timing and command queuing.
 >>
 >> ie. Why
 Henner's BUMPS cape for the BBB uses the A8s specific
 >> programmeable PRU for real time
 control of the pins.
 >>
 >>
 >>
 >> On Wed, Nov 11, 2015 at 9:00 PM,
 Zachary Morriss
 >> <zmorriss at gmail.com<mailto:zmorriss at gmail.com>>
 wrote:
 >> I don't want to distract
 this perfectly excellent hack in progress, but
 >> being that the laser is EOL, it might
 be time to invest in some new
 >>
 jank:
 >> http://www.amazon.com/Engraving-Cutting-Engraver-Parallel-Winsealxp/dp/B00C9UZCOS/ref=sr_1_1?ie=UTF8&qid=1447304268&sr=8-1&keywords=40+watt+laser
 >>
 >> Price goes up
 and down and can be had cheaper on ebay.
 >>
 >> Or even
 better, something with a DSP controller, z adjust, air
 assist,
 >> and a little moar power:
 >> http://www.aliexpress.com/item/Free-ship-Best-price-rayjet-laser-engraver-3040-co2-laser-cutting-machine-50W-with-rotary/32247621015.html?spm=2114.01010108.3.48.cC334H&ws_ab_test=searchweb201556_1_71_72_73_74_75,searchweb0_0,searchweb201560_9<http://www.aliexpress.com/item/Free-ship-Best-price-rayjet-laser-engraver-3040-co2-laser-cutting-machine-50W-with-rotary/32247621015.html?spm=2114.01010108.3.48.cC334H&ws_ab_test=searchweb201556_1_71_72_73_74_75%2csearchweb0_0%2csearchweb201560_9>
 >>
 >> Just stirring
 the pot,
 >> Zach
 >>
 >>
 >> On Wed, Nov 11, 2015 at 8:22 PM, Brian
 Klug
 >> <brian.klug at gmail.com<mailto:brian.klug at gmail.com>>
 wrote:
 >>> USB to DB25 Adapter Uses
 GRBL For Parallel Port CNC ...
 >>
 >> The following USB <-> GRBL
 interface might help..?
 >>
 >> http://www.esreality.com/files/placeimages/2013/93363-gerbil.gif
 >>
 >>
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 >> Noisebridge-discuss at lists.noisebridge.net<mailto:Noisebridge-discuss at lists.noisebridge.net>
 >> https://www.noisebridge.net/mailman/listinfo/noisebridge-discuss
 >>
 >>
 >>
 >>
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 >>
 >>
 >>
 >>
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